???
Don't international students subsidize domestic students because they pay much higher tuition? I'm not sure how reducing their numbers would be a good thing, at least for domestic students.
>tax college endowments
Endowments come from donations, not tuition, and if anything they subsidize the tuition. At best taxing them would be breaking the piggy bank for a one time cash infusion.
>remove higher education non profit status
Eliminating non-profit status won't matter when the institutions are blowing all that revenue on bloated staff.
>and let the higher education industrial complex collapse in on itself.
Based on this and your other suggestions, it seems like you're more interested in smashing the "higher education industrial complex" rather than fixing it.